The place a person is going when they've decided to put themself into a less than desirable, potentially hurtful, or crap, situation. The only thing on the menu, regardless of how it appears, is shit. Often the person will know they are about to go there, but feel almost powerless to stop it.
Friend: You know, I got a message from him last night and he wants to see me again....maybe he really cares this time.
Concerned friend: Oh no!.....you're not going to see him are you? Please don't give him another chance to break your heart again.
Friend: I'm feeling weak and I want to see him so badly..... It looks like I'll be heading back to the Shit Cafe.
Employee 1: The boss just asked me to work this weekend and I caved.
Employee 2: Man, I already told them no way! I can't believe you're gonna eat that shit sandwich
Employee 1: I know....I'm such a loser. I keep letting people take me to the Shit Cafe even though I know the only thing on the menu is crap!
Employee 2: Yeah the boss is such an asshole
...he knows how often you eat there.